intermittent ping failures

Hi!

I have a script in one of my servers, that pings lots of servers (around 11) every 5 minutes, and some of them are in C7000 chassis (blade). There is one blade running hpux 11.31, that the ping fails around 20 times in a day, and if I am on it, I press enter at prompt and nothing happens, but after few seconds it responds.

Would this be a hardware failure on the blade, or something else? the other blades on the same chassis do not have this problem.